Ripped off at chevron station on 15 D southbound about 100 km north of Los Mochis. A short (5 ft 5) attendant there is a master at the 50 for 500 peso switch. I was not 100% sure I had been scammed until another in my group also had the same thing happen to him after he fueled up, so now I am sure. I can extract this guys picture from my dash cam, so I am going to launch a complaint with the chevron head office.

I had that happen once. But I always ask for the exact amount like $2,000. pesos and I come out of RV with that amount. He pulled that with the help of an accomplice. He got my attention just as I handed the attendant the $2,000.00 the other guy got me to turn my head and then the attendant said senior your $450.00 pesos short.
I laughed at him, and speaking Spanish I told him I had counted the money previously. He insisted, I made him empty his pockets and there was a crumpled $500.00 peso, he got my wrath and our fellow RVers who spoke Spanish read him the riot act!
Senor mi culpa perdoname por favor.
Best case count your pesos out to the attendant this will stop this scam, but I have caught them at other scams.
Se intelegente amigos.

A friend was just double charged on his credit card at the pemex station just south of the San Miguel toll booth in Los mochis. This si the one opposite the access road to El Jito RV park. May or may not have been a scam attempt.